Lattice QCD matrix elements for the $B_s^0-{\bar{B}}_s^0$ width difference beyond leading order

Christine T. H. Davies, Judd Harrison, G. Peter Lepage +3

Predicting the $B_s^0-{\bar{B}}_s^0$ width difference $\Delta {\Gamma }_s$ relies on the heavy quark expansion and on hadronic matrix elements of $\Delta B=2$ operators. We present the first lattice QCD…